Pencil.



PATENTE'D MAY 2, 1905.

A. E. BUGKINGHAM.

PENCIL.

APPLICATION FILED SEPT. 15, 1904.

W/itnesses:- [2mm $02 d/Mfi 2w; 797% m2;

UNITED STATES Patented May 2,1905.

PATENT ()FFICE.

ALBERT E. BUCKINGHAM, OF OAKLAND, CALIFORNIA, ASSIGNOR TO .THE CONTINENTAL MANUFACTURING COMPANY, OF OAKLAND,

CALIFORNIA, A CORPORATION OF CALIFORNIA.

PENCIL.

SPECIFICATION forming part of Letters Patent No. 788,998, dated May 2, 1905.

Application filed September 15, 1904. Serial No. 224,543.

To all whom it may concern:

Be it known that I. ALBERT E. BUCKING- HAW, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Pencils, of which the following is a specification.

My invention relates to improvements in pencils. It is especially designed for use in that class of pencils in which a movable lead is fitted to a body or holder and is slidable therein, so as to advance from time to time, as required.

My invention comprises a means for advancing the lead and for holding it at any point of advancement and in details of construction, which will be more fully explained by reference to the accompanying drawings, in which Figure 1 shows my improved device. Fig. 2 is a section on line 1 y of Fig. 1. Fig. 3 is a section on line m 00 of Fig. 2 on an enlarged scale. Fig. 4 shows blank for the sleeve. Fig. 5 shows locking-device blank.

As here shown, A is an outer body or holder which is commonly made of wood, but may be also made of other material, if preferred. This body is pointed at one end and may carry an eraser or other device at the opposite end. Intermediate between these two points a slit 2 is made, extending to near the tapered point of the outer body. Centrally within this body is a hole of suflicient size to receive the lead or marking part 3, which is slidable there in. In order to advance this lead from time to time as it is worn, I employ a feeding device and a carrying-sleeve which may be constructed as follows: 4 is the outer sleeve, which is preferably made with fillets at each end, and it has a slot or channel extending from one fillet to the other, as shown at 5. This sleeve is preferably made so that the fillet or end portions are in continuous circles. The advancing portion is formed by a plate which is shown extended, as at 6. This plate the sleeve.

than the circumferenceof the sleeve to allow of the end 7 being turned inwardly, so as to 5 pass through the slit 5. This slit or channel is coincident with the slit 2, which is made in the body of the pencil, and these inturned ends 7 extend into the channel, in which the marking-lead lies, so that as they stand behind the lead it will be seen that by pushing the sleeve along the pencil-body these inturned edges will advance the lead as required.

I have shown a locking device which consists of a plate 8, having sharp points or tongues, as at 9, on one edge. This plate passes between the two inturned edges 7 of the exterior sleeve 6, which thus form a guide within which the toothed plate is turnable.

In order to pivot this plate properly, an in- 5 protuberance is fitted into the indentation 10 7 of one of the parts 7 it forms a pivot about which .the plate 8 may be turned. This plate 8 preferably has a curved projecting portion, as at 8, and this projecting portion is bent over, so as to substantially coincide with the exterior of the sleeve, and it serves as a means for lifting or turning the plate 8 about its pivot-point 11, so as to either raise the points 9 from the bottom of the channel in which the marking-lead lies or to allow it to be pushed down. so that these points will engage with the wood at the bottom of the channel. The points are so formed that they will interlock with the bottom of the channel and will thus prevent the sleeve from being pushed back- 5 ward or toward the upper end of the pencilbody until the points have been disengaged. Thus when the marking portion or lead has been worn until it is necessary to advance it the ring may be pushed down, the points slid- 9 ing along the channel either with or without being lifted, and when the points are again pressed down they will engage, as previously stated, and prevent any pressure upon the lead from retracting it. When the lead has been exhausted and it is desired to introduce a new one, by simply turning the plate 8 about its pivot 11 the points 9 will be raised, and the sleeve may then be freely moved back to the upper end of the pencil. In this way the outer body may be'made resembling an ordinary pencil having a channel for the lead and a means for advancing and fixing the lead in position, so that the same outer body may be used indefinitely.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is-

1. In a pencil, an outer body having acentral channel and a longitudinal slot connecting the channel with the exterior of the body, a cylindrical sleeve surrounding and slidable upon the body, said sleeve having a slot or channel coincident with the slot of the pencil-body, an exterior sleeve fitting the first named and having inturned edges projecting through the slot in the inner sleeve and the pencil-body and into the line of the channel containing the marking-lead.

2. In a pencil, an outer body having a central channel and a longitudinal slot, a lead movable in the channel, said slot connecting said channel with the exterior of the body, a sleeve filleted at each end having a longitudinal slot between the fillets coincident with the slot of the pencil body, an exterior sleeve fitting around the central portion of the first-named sleeve having inturned edges projecting through the slots and into the central channel, a plate pivoted and turnable between said inturned portions, said plate having points adapted to engage with the interior to lock the sleeve with relation to'the pencil-body.

3. In a pencil, a body having a central channel to receive a lead, and a longitudinal slot connecting the channel with the exterior of the body, a sleeve slidable upon the body having a longitudinal slot between its ends coincident with the slot of the body, a second sleeve fitting around the first-named sleeve having inturned edges projecting through the slots into the central channel, a plate pivoted between said inturned edges,said plate having interior points adapted to lock with the inside of the pencil-body to prevent movement of the sleeve and the lead and having a tongue bent to substantially fit the curvature of the outer sleeve and serve as a handle to open or close the locking-plate.

In testimony whereof I have hereunto set my hand in presence of tWo subscribing Witnesses.

ALBERT E. BUCKINGHAM. Witnesses:

S. H. NOURSE, JESSIE C. BRODIE. 

